Energy-Efficient Design of IRS-NOMA Networks

Fang, Fang; Xu, Yanqing; Pham, Quoc-Viet; Ding, Zhiguo

Abstract

Combining intelligent reflecting surface (IRS) and non-orthogonal multiple access (NOMA) is an effective solution to enhance communication coverage and energy efficiency. In this paper, we focus on an IRS-assisted NOMA network and propose an energy-efficient algorithm to yield a good tradeoff between the sum-rate maximization and total power consumption minimization. We aim to maximize the system energy efficiency by jointly optimizing the transmit beamforming at the BS and the reflecting beamforming at the IRS. Specifically, the transmit beamforming and the phases of the low-cost passive elements on the IRS are alternatively optimized until the convergence. Simulation results demonstrate that the proposed algorithm in IRS-NOMA can yield superior performance compared with the conventional OMA-IRS and NOMA with a random phase IRS.

Citation

Fang, F., Xu, Y., Pham, Q., & Ding, Z. (2020). Energy-Efficient Design of IRS-NOMA Networks. IEEE Transactions on Vehicular Technology, 69(11), 14088-14092. https://doi.org/10.1109/tvt.2020.3024005

• Journal Article Type: Article
• Acceptance Date: Sep 9, 2020
• Online Publication Date: Sep 15, 2020
• Publication Date: 2020-11
• Deposit Date: Sep 13, 2020
• Publicly Available Date: Nov 27, 2020
• Journal: IEEE Transactions on Vehicular Technology
• Print ISSN: 0018-9545
• Publisher: Institute of Electrical and Electronics Engineers
• Peer Reviewed: Peer Reviewed
• Volume: 69
• Issue: 11
• Pages: 14088-14092
• DOI: https://doi.org/10.1109/tvt.2020.3024005